<template>
  <el-row class="warp">
    <el-col :span="24" class="warp-breadcrum">
      <el-breadcrumb separator="/">
        <el-breadcrumb-item :to="{ path: '/' }"><b>首页</b></el-breadcrumb-item>
        <el-breadcrumb-item>系统管理</el-breadcrumb-item>
        <el-breadcrumb-item>权限树</el-breadcrumb-item>
      </el-breadcrumb>
    </el-col>

    <el-col :span="24" class="warp-main" v-loading="loading" element-loading-text="拼命加载中">
      <el-tree
        :data="data2"
        show-checkbox
        default-expand-all
        node-key="id"
        ref="tree"
        highlight-current
        :props="defaultProps">
      </el-tree>


      <div class="buttons">
        <el-button @click="getCheckedNodes">通过 node 获取</el-button>
        <el-button @click="getCheckedKeys">通过 key 获取</el-button>
        <el-button @click="setCheckedNodes">通过 node 设置</el-button>
        <el-button @click="setCheckedKeys">通过 key 设置</el-button>
        <el-button @click="resetChecked">清空</el-button>
      </div>
    </el-col>
  </el-row>
</template>

<script>
  export default {
    methods: {
      getCheckedNodes() {
        console.log(this.$refs.tree.getCheckedNodes());
      },
      getCheckedKeys() {
        console.log(this.$refs.tree.getCheckedKeys());
      },
      setCheckedNodes() {
        this.$refs.tree.setCheckedNodes([{
          id: 5,
          aa:3
        }, {
          id: 9,
          label: '三级 1-1-1'
        }]);
      },
      setCheckedKeys() {
        this.$refs.tree.setCheckedKeys([7]);
      },
      resetChecked() {
        this.$refs.tree.setCheckedKeys([]);
      }
    },

    data() {
      return {
        loading : false,
        data2: [{
          id: 1,
          label: '一级 1',
          children: [{
            id: 4,
            label: '二级 1-1',
            children: [{
              id: 9,
              label: '三级 1-1-1'
            }, {
              id: 10,
              label: '三级 1-1-2'
            }]
          }]
        }, {
          id: 2,
          label: '一级 2',
          children: [{
            id: 5,
            label: '二级 2-1'
          }, {
            id: 6,
            label: '二级 2-2'
          }]
        }, {
          id: 3,
          label: '一级 3',
          children: [{
            id: 7,
            label: '二级 3-1'
          }, {
            id: 8,
            label: '二级 3-2'
          }]
        }],
        defaultProps: {
          children: 'children',
          label: 'label'
        }
      };
    },

    mounted() {
      //this.loading=false;
    }
  };

</script>

<style scoped>

</style>
